The GTI and the Rabbit use different bulbs for the front turn signals.
Have yet to find LEDs that will fit the front turn signal in the GTI fixture.
The GTI uses a special bayonet base 12W slim halogen bulb in the front turn signal
The Rabbit uses a standard 1156 bulb in the front turn signal, just like the tail lights.
LEDs that will fit the Rabbit fixture are more common,
superbrightleds.com (the banner ad in this thread) has a whole page of 1156 LEDs,
but none are 'error canceling' .
They offer an external resistor to address the issue,
but now you are into wiring modifications - not plug and play.
Unless you can find 'error canceling' 1156 bulbs,
they will not work plug and play.
Regular LEDs will trigger a bulb out and disable the circuit.
Regular LEDs that fit the 1156 socket are easy to find,
but the 'error canceling' aka canbus bulbs are more rare.
They seem to exist ...
canbus turn lights - 1156 -4W
but I have yet to find a source for them.